package com.itheima.reggie.contreller;

import com.itheima.reggie.common.R;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.Servlet;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@RestController
@RequestMapping("common")
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){
        String originalFilename=file.getOriginalFilename();
        String  suffix=originalFilename.substring(originalFilename.lastIndexOf("."));
        String fileName= UUID.randomUUID().toString()+suffix;

        File dir=new File(basePath);
        if(!dir.exists()){
            dir.mkdir();
        }

        try {
            file.transferTo(new File(basePath+fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }

        return R.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response){
        try {
            FileInputStream fileInputStream=new FileInputStream(basePath+name);

            ServletOutputStream outputStream= response.getOutputStream();

            response.setContentType("image/jpeg");
            int len=0;
            byte[] bytes=new byte[1024];

           while ((len=fileInputStream.read(bytes))!=-1){
               outputStream.write(bytes,0,len);
               outputStream.flush();
           }

           outputStream.close();
           fileInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }


    }
}
